Over on Reddit, user TimFromTheBeach reports the discovery of a secret cow level in WoW. The secret cow level is a long-running joke from Diablo. Despite tooltips suggesting such a thing didn't exist, players could find their way into a special location in Diablo II where they'd fight axe-wielding, bipedal cows.

WoW's version seems to operate in a reasonably faithful way. In a nod to Diablo III, Wowhead reports you'll need to track down a treasure goblin and kill it, which is no easy feat. After traveling through a portal it creates, you'll be sent to a location with killer cows, including The Cow King. Killing this enemy drops a special toy, which, when used, rewards you with the Diablo's 20th Anniversary achievement. For a hell-ish touch, the toy has a cooldown of 66 minutes and 6 seconds. You can see some of this in the video above.

The Cow King can also drop other items that reference the Diablo games (like a Scroll of Town Portal and various charms), as can the treasure goblins. One item Wowhead says it has datamined but not seen yet is the Stone of Jordan, which was a popular Diablo II ring that effectively served as the game's currency.

Items drop from The Cow King only once a day during the event, which runs through January 11. Killing it doesn't impact your ability to return to the Cow Level, as was the case with Diablo II's variant.